Sidney overhears a band in his local pub and aspires to be their manager, not so ably assisted by his brother-in-law, Timmy, both still window cleaning for a living. They rename the band Kipper and after a misfortune, Timmy joins the line-up and many sexual encounters follow as a result. Unfortunately, Timmy's natural talent is more mayhem than rock star and disaster ensues of mostly the semi-clothed kind.
Pop Performer was the only film in the series to spawn a soundtrack album on the Polydor label, with musical numbers produced by Ed Welch, and credited to the film’s fictional groups Kipper, and The Climax Sisters (played by Diane Langton and Linda Regan in the film, although Sue Martine provides Regan’s singing voice). The album also includes music from Confessions of a Window Cleaner and in-character ‘Timmy Chat’ from Robin Askwith.